package com.sky.aspect;


import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;

@Aspect
@Component
@Slf4j
public class AutoFillAspect {
    /**
     * 切入点
     */
    @Pointcut("execution(* com.sky.mapper.*.*(..)) && " +
            "@annotation(com.sky.annotation.AutoFill)")
    public void autoFillPointCut(){

    }

    @Before("autoFillPointCut()")
    public void autoFill(JoinPoint joinPoint){
        log.info("开始进行公共自动填充");

        //获取到当前被拦截的方法上的数据库操作类型
        MethodSignature signature =(MethodSignature)
                joinPoint.getSignature();//获取方法签名
        AutoFill autoFill=signature.getMethod()
                .getAnnotation(AutoFill.class);//获得方法上的注解对象

OperationType operationType = autoFill.value();//获取数据库操作类型

        //获取到当前被拦截的方法的参数--实体对象
        Object[] args=joinPoint.getArgs();
        if (args==null || args.length==0){
            return;
        }

            Object entity= args[0];

        //准备赋值的数据
        LocalDateTime now=LocalDateTime.now();
        Long currentid= BaseContext.getCurrentId();

        if(operationType == OperationType.INSERT){
         try {
             Method setCreateTime =entity.getClass().getDeclaredMethod
                     (AutoFillConstant.SET_CREATE_TIME,LocalDateTime.class);

             Method setCreateUser=entity.getClass().getDeclaredMethod
                     (AutoFillConstant.SET_CREATE_USER,Long.class);

            Method setUpdateTime=entity.getClass().getDeclaredMethod
                    (AutoFillConstant.SET_UPDATE_TIME,LocalDateTime.class);

            Method setUpdateUser=entity.getClass().getDeclaredMethod
                    (AutoFillConstant.SET_UPDATE_USER,Long.class);

         //通过反射为对象属性赋值
             setCreateTime.invoke(entity,now);
             setCreateUser.invoke(entity,currentid);
             setUpdateTime.invoke(entity,now);
             setUpdateUser.invoke(entity,currentid);
         }catch (Exception e){
             e.printStackTrace();
         }
        }else if (operationType==OperationType.UPDATE){
            try {
                Method setUpdateTime=entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME,LocalDateTime.class);
                Method setUodateUser=entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER,Long.class);

                setUpdateTime.invoke(entity,now);
                setUodateUser.invoke(entity,currentid);
            }catch (Exception e){
                e.printStackTrace();
            }
        }
    }

}
